Automatic grasper.



PATENTED APR. 24, 1906.

APPLICATION FILED $113.12. 1006 2 SHEETS-SHEET 1.

{9,6,6 6 5. I k/gfjqgrs /Mw Z n g/[ 6 Z2 No. 818,736. PATBNTED APR. 24, 1906. K. BUTTGHER & F. HEYM.

AUTOMATIC GRASPER.

APPLIO'ATION FILED PEB.12. 1906.

2 SHEBTS SHEET 2.

I 076. X/Z/arnew ND FRTEDREUH HEYM, OF BENRATH, NEAR SSELDORF, GERMANY.

enneea-zi Specification of Lott-era Potent.

Patented April 24, 1906,

Application filed February 13,1908. Serial No; 800.837

roses. and King of esirlents of i Province of 1V6 jointly ini nprovenlents the followion,

to automatic respcoerse goo s, as :lcoording to our invenrs shovels are provided, lines-levers around an ed from specific govern- Ile shovels are intended ids with increasing power to be hoisted, when closure lies place. In such graspers hello employed for closing the ,o? pulleys arranged horizontally, tannin v, constant pot or for clos- Furthermore, by such on ho of pulleys e drawback he rope when taken from to the pulleys lending bent oil in a direction dif- 2 one, whereby the wear- "'liOHlOtt-(b A further draw- 1" reby that the horizonas of the rope lying home goods when the gresper is oot with the rough SlCliQI wearing of the rope is owing to the horizontal ertnesetof pulleys. The closing is almost the same magnitude mo closure of the shovels and the lat 2w are often not in the osition to being: between tile shovels, he automatic grssper hes been put wit ut being closed. These drowl the present invention, :lent constructional form of en ry sp is illustrated. in the followin wmch s at side elevation of a closed is 3- side elevation of the lelel o' ivnod.

:unilur letters denote simi and b l) are knee-levers, connecced with their one end oi the shovels.

c c are governin -levers pivotally secured at the inner end oi the shovels and carrying the some. -he knee-levers b b are rotatably mounted on the governing-levers c c and are fixed with their other end to the movable axle e, carrying the pulleys d.

e is a stationery axle from which the governing-levers c ic are suspended and upon which the pulleys d are mounted.

f is a, cross-heed carried by the axle e.

Around the pulleysd d the rope g for opening end closing the shovels is wound, the ends of which are secured at the cross-heed The letter compensates, furthermore, unequal dilstetions of the rope. The rope is taken upward to a geering arrangement (not shown) for operstin the set of pullevs.

g 1s a lin at both ends of the axle e and carried thereby. The link g is provided with a slot 9 in which the axles of the movable pulleys d moves up and down; The links g project with their parts 57 over the axle e and carry shells h it for guiding the rope g The construction as foregoing described operates in the following manner: After the grasper is lowered till it has reached the goods to be lifted the shovels a are opened by winding oil the T036 g, thereby permitting the pulleys d to be lowered in the slot 9 and to rotube the levers b 1) around the pins e e. The opening of the shovels is limited by the slot 9 In order to seize the goods automatically by the shovels, thcnthe pulleys (Z must be moved u wsrdly by viuding up the rope g. The loo ring power at the beginnin of the closure is about e ual to that exerte by the set of pulleys. wing to the arrangement of the knee-levers b b, the closing power is gradually increased fill its hi host amount,

when the inner lever ports of t e knee-levers b b are almost horizontal. The slot 9 prevents the knee-levers b b from being crushed if the shovels are closed.

The arrangement can be modified by mounting the cross-heed f on the axle e. The links g can be secured at the axle e, and the slot 9 can be arranged in the upper part of the links for guiding the up er axle e".

' Having thus fully descri )ed the nature of our invention, what we desire to secure by Letters Patent of the United States is An automatic grasper comprising in combination shovels, knee-levers pivotelly con- Q magma neat-mint their one end mth the outer edge of i able and stationary giuileys and fluke: carried the said shcvels, goveming-ievers rotatably by said stationary aide and provided with it carryin said knee-levers and pivoiafiy sesiot engaging said movabie axle.

Hui-ed 00' the inner edge of he shovels, stal Znwitness whereof wehave here nto signed wzionary puileys, a statienary axle upon which l our'negnes in the presence 0? 153m 2 said sta omnary pulleys and said governing BGTT levers are mounted, nmvable-puileys, a mevl FRIEBREQH EEYIYK.

able axle carrying said mevable pulleys and Witnesses: bemg cemeeted with the other endsef sand WILLIAM Essmzwzam, [O knee-levers, a rope wousd around the mov- FRIEDRIQH 

